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BUSINESS SEGMENT AND GEOGRAPHIC INFORMATION (Details 1) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Revenues $ 24,699 $ 27,177
United States [Member]    
Revenues 15,511 18,496
Canada [Member]    
Revenues $ 9,188 $ 8,681